Shower wall mounted back scrubber



FIG. 1 is a front elevation view of a shower wall mounted back scrubber showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a left side elevation view thereof, each of the opposite side, the top side, and the bottom side being a mirror image of the shown; and,

FIG. 4 is an isometric view thereof.

The broken lines in FIG. 4 of the drawings depict a shower wall as environmental subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a shower wall mounted back scrubber, as shown and described. 